556 NZUS01 KTFX 151030 RWSGTF MTZ008>015-044>055-160000- Regional Weather Synopsis National Weather Service Great Falls MT 430 AM MDT Sat Jun 15 2019 Mostly sunny conditions to start off the morning, becoming partly cloudy by the late morning. Isolated weak thunderstorms will develop again over North Central Montana later this morning, and carrying into early this evening. Temperatures trend cooler over the weekend. &&